Hudson Animal Hospital: New York’s Trusted Veterinarians

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How Often Should You Deworm Your Cat?

New York, United States – April 15, 2026 / Hudson Animal Hospital /

Cat owners put a lot of thought into feeding, play, and grooming, but intestinal parasites in cats are easy to overlook. Just as vets caution against using human toothpaste with pets, they emphasize the vital importance of parasite prevention. In this guide, Hudson Animal Hospital answers the common question “How often should you deworm a cat?” and the factors that determine the right schedule.

Why Deworming Matters for New York Cats

Cats of all ages can pick up intestinal parasites. Roundworms and tapeworms are among the most frequently seen by veterinarians. Both types settle into the intestines and feed off nutrients from the cat’s food, quietly affecting the animal’s health.

Roundworms are especially prevalent in kittens, while tapeworms tend to show up more in adult and senior cats, linked to flea exposure or hunting small rodents. Even indoor cats are at risk, since fleas carrying tapeworm larvae can hitch a ride inside on clothing or other pets.

Signs of Worm Infestation in Cats

The signs of worm infestation in cats can be easy to miss. Common warning signs include:

Diarrhea: Loose or bloody stools can point to a parasitic infection.
Weight loss: Worms compete with the cat for nutrients, leading to noticeable weight changes.
Weakness or lethargy: A cat that seems unusually tired may be dealing with an internal parasite load.
Changes in coat: A dull or patchy coat is sometimes associated with intestinal parasites in cats.
Loss of fur (alopecia): In more severe cases, fur loss can occur alongside other symptoms.

Contact a veterinarian in New York if any of these symptoms appear. They can run a fecal test and recommend appropriate treatment.

How Often Should You Deworm Your Cat?

How often should you deworm a cat? The answer depends on age and lifestyle. Kittens are especially vulnerable because their immune systems are still developing. Experts recommend the following kitten deworming frequency:

First treatment when the kitten is between four and six weeks old
A second treatment at eight weeks
An additional round at 12 weeks
Continued deworming every four weeks until the kitten reaches six months of age

For adult cats, most do well with deworming every one to three months, with four times per year being a common standard. Indoor-only cats still benefit from regular preventive parasite control, and a veterinarian can help tailor the right schedule.

Supporting Cat Health Between Dewormings in New York

Keeping the litter box clean is one of the most effective habits between treatments, since parasitic eggs can cling to a cat’s paws. Staying on top of flea prevention is equally important, given the link between fleas and tapeworm transmission.

Hudson Animal Hospital recommends bringing a stool sample to appointments so the veterinarian can confirm which parasite is present and choose the most effective treatment.

About Hudson Animal Hospital

Understanding the answer to “How often should you deworm a cat?” is the first step toward better feline health. Hudson Animal Hospital provides comprehensive veterinary care for cats and dogs across New York, from routine wellness exams to parasite prevention and treatment. To schedule an appointment, contact Hudson Animal Hospital at (212) 706-4088.